Datasheet - LM217, LM317 - 1.2 V to 37 V …

1 This is information on a product in full production. March 2014 DocID2154 Rev 191/25LM217, V to 37 V adjustable voltage regulatorsDatasheet - production dataFeatures Output voltage range: to 37 V Output current in excess of A % line and load regulation Floating operation for high voltages Complete series of protections: current limiting, thermal shutdown and SOA controlDescriptionThe LM217, LM317 are monolithic integrated circuits in TO-220, TO-220FP and D PAK packages intended for use as positive adjustable voltage regulators. They are designed to supply more than A of load current with an output voltage adjustable over a to 37 V range. The nominal output voltage is selected by means of a resistive divider, making the device exceptionally easy to use and eliminating the stocking of many fixed PAKT able 1.

2 Device summaryOrder codesTO-220 (single gauge) TO-220 (double gauge)D PAK (tape and reel) , LM3172/25 DocID2154 Rev 19 Contents1 Pin configuration .. 32 Maximum ratings .. 43 Diagram .. 54 Electrical characteristics .. 65 Typical characteristics .. 96 Application information .. 107 Package mechanical data .. 148 Packaging mechanical data .. 229 Revision history .. 24 DocID2154 Rev 193/25LM217, LM317 Pin configuration251 Pin configuration Figure 1. Pin connections (top view) 72 )372 ' 3$. Maximum ratingsLM217, LM3174/25 DocID2154 Rev 192 Maximum ratings Note:Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not 2.

3 Absolute maximum ratingsSymbolParameterValueUnitVI - VOInput-reference differential voltage40 VIOO utput currentInternally limitedATOPO perating junction temperature for:LM217- 25 to 150 CLM3170 to 125LM317B-40 to 125 PDPower dissipationInternally limitedTSTGS torage temperature- 65 to 150 CTable 3. Thermal dataSymbolParameterD PAKTO-220TO-220 FPUnitRthJCThermal resistance junction-case355 C/WRthJAThermal resistance C/WDocID2154 Rev 195/25LM217, LM317 Diagram253 Diagram Figure 2. Schematic diagram Electrical characteristicsLM217, LM3176/25 DocID2154 Rev 194 Electrical characteristicsVI - VO = 5 V, IO = 500 mA, IMAX = A and PMAX = 20 W, TJ = - 55 to 150 C, unless otherwise specified. Table 4.

4 Electrical characteristics for LM217 SymbolParameterTest VOLine regulationVI - VO = 3 to 40 VTJ = 25 VOLoad regulationVO 5 VIO = 10 mA to IMAXTJ = 25 C515mV2050VO 5 V,IO = 10 mA to IMAXTJ = 25 pin current50100 A IADJA djustment pin currentVI - VO = to 40V IO = 10 mA to AVREFR eference voltageVI - VO = to 40V IO= 10 mA to IMAXPD VO/VOOutput voltage temperature stability1%IO(min)Minimum load currentVI - VO = 40 (max)Maximum load currentVI - VO 15 V, PD < - VO = 40 V, PD < PMAX, TJ = 25 noise voltage (percentage of VO)B = 10Hz to 100kHz, TJ = 25 voltage rejection (1)TJ = 25 C, f = 120 HzCADJ=065dBCADJ=10 F66801. CADJ is connected between adjust pin and Rev 197/25LM217, LM317 Electrical characteristics25VI - VO = 5 V, IO = 500 mA, IMAX = A and PMAX = 20 W, TJ = 0 to 125 C, unless otherwise specified.

5 Table 5. Electrical characteristics for LM317 SymbolParameterTest VOLine regulationVI - VO = 3 to 40 VTJ = 25 VOLoad regulationVO 5 VIO = 10 mA to IMAXTJ = 25 C525mV2070VO 5 V,IO = 10 mA to IMAXTJ = 25 pin current50100 A IADJA djustment pin currentVI - VO = to 40V, IO = 10 mA to AVREFR eference voltage (between pin 3 and pin 1)VI - VO = to 40V IO = 10 mA to 500mA PD VO/VOOutput voltage temperature stability1%IO(min)Minimum load currentVI - VO = 40 (max)Maximum load currentVI - VO 15 V, PD < - VO = 40 V, PD < PMAX, TJ = 25 noise voltage (percentage of VO)B = 10Hz to 100kHz, TJ = 25 voltage rejection (1)TJ = 25 C, f = 120 HzCADJ=065dBCADJ=10 F66801. CADJ is connected between adjust pin and characteristicsLM217, LM3178/25 DocID2154 Rev 19VI - VO = 5 V, IO = 500 mA, IMAX = A and PMAX = 20 W, TJ = - 40 to 125 C, unless otherwise specified.

6 Table 6. Electrical characteristics for LM317 BSymbolParameterTest VOLine regulationVI - VO = 3 to 40 VTJ = 25 VOLoad regulationVO 5 VIO = 10 mA to IMAXTJ = 25 C525mV2070VO 5 V,IO = 10 mA to IMAXTJ = 25 pin current50100 A IADJA djustment pin currentVI - VO = to 40V, IO = 10 mA to AVREFR eference voltage (between pin 3 and pin 1)VI - VO = to 40V IO = 10 mA to 500mA PD VO/VOOutput voltage temperature stability1%IO(min)Minimum load currentVI - VO = 40 (max)Maximum load currentVI - VO 15 V, PD < - VO = 40 V, PD < PMAX, TJ = 25 noise voltage (percentage of VO)B = 10Hz to 100kHz, TJ = 25 voltage rejection (1)TJ = 25 C, f = 120 HzCADJ=065dBCADJ=10 F66801. CADJ is connected between adjust pin and Rev 199/25LM217, LM317 Typical characteristics255 Typical characteristics Figure 3.

7 Output current vs. input-output differential voltageFigure 4. Dropout voltage vs. junction temperature Figure 5. Reference voltage vs. junction Figure 6. Basic adjustable regulator ,QSXW,QSXW2 XWSXW2 XWSXW$GM$GMApplication informationLM217, LM31710/25 DocID2154 Rev 196 Application informationThe LM217, LM317 provides an internal reference voltage of V between the output and adjustments terminals. This is used to set a constant current flow across an external resistor divider (see Figure 6), giving an output voltage VO of: VO = VREF (1 + R2/R1) + IADJ R2 The device was designed to minimize the term IADJ (100 A max) and to maintain it very constant with line and load changes. Usually, the error term IADJ R2 can be neglected.

8 To obtain the previous requirement, all the regulator quiescent current is returned to the output terminal, imposing a minimum load current condition. If the load is insufficient, the output voltage will rise. Since the LM217, LM317 is a floating regulator and "sees" only the input-to-output differential voltage , supplies of very high voltage with respect to ground can be regulated as long as the maximum input-to-output differential is not exceeded. Furthermore, programmable regulators are easily obtainable and, by connecting a fixed resistor between the adjustment and output, the device can be used as a precision current regulator. In order to optimize the load regulation, the current set resistor R1 (see Figure 6) should be tied as close as possible to the regulator, while the ground terminal of R2 should be near the ground of the load to provide remote ground sensing.

9 Performance may be improved with added capacitance as follow: An input bypass capacitor of F An adjustment terminal to ground 10 F capacitor to improve the ripple rejection of about 15 dB (CADJ). An 1 F tantalum (or 25 F Aluminium electrolytic) capacitor on the output to improve transient response. In addition to external capacitors, it is good practice to add protection diodes, as shown in Figure 7 D1 protect the device against input short circuit, while D2 protect against output short circuit for capacitance :D1 protect the device against input short circuit, while D2 protects against output short circuit for capacitors 7. voltage regulator with protection diodes **OQVUOQVU0 VUQVUVUQVU"EKVTUEKVTUDocID2154 Rev 1911/25LM217, LM317 Application information25IO = (VREF / R1) + IADJ = V / R1 Figure 8.

10 Slow turn-on 15 V regulator **OQVUOQVU0 VUQVUVUQVU"EKVTUEKVTUF igure 9. Current regulator **OQVUOQVU0 VUQVUVUQVU"EKVTUEKVTUF igure 10. 5 V electronic shut-down regulator **OQVUOQVU0 VUQVUVUQVU"EKVTUEKVTUA pplication informationLM217, LM31712/25 DocID2154 Rev 19(R2 sets maximum VO)* RS sets output impedance of charger ZO = RS (1 + R2/R1). Use of RS allows low charging rates whit fully charged 11. Digitally selected outputs **OQVUOQVU0 VUQVUVUQVU"EKVTUEKVTUF igure 12. Battery charger (12 V) **OQVUOQVU0 VUQVUVUQVU"EKVTUEKVTUDocID2154 Rev 1913/25LM217, LM317 Application information25* R3 sets peak current ( A for 1 0).** C1 recommended to filter out input 13. Current limited 6 V charger **OQVUOQVU0 VUQVUVUQVU"EKVTUEKVTUP ackage mechanical dataLM217, LM31714/25 DocID2154 Rev 197 Package mechanical dataIn order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance.